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3. luas Δ = 1/2 *a*tt = Luas : 1/2*a
=48cm² : 1/2*8cm = 48 : 4 = 12cm
jadi t= 12 cm
jawab.b.12 cm
semoga bantu yaaa
L = 1/2 × a × t
48 = 1/2 × 8 × t
48 × 2= 8 × t
96 : 8 = t
12 = t